1969 Chevrolet Corvair vs 1970 Oldsmobile W31 PURE STOCK DRAG RACE - no commentary

1969 Chevy Corvair Monza drag race 1970 Oldsmobile F85 W-31
First car is a 1969 Chevrolet Corvair Monza. The other a 1970 Oldsmobile F85 W31. The Corvair Monza has a 164 flat-6 engine. The Olds W31 has a 350 V8. The Corvair makes 140 horsepower, and the Oldsmobile F85 325 horsepower. The Corvair Monza has a 4-speed manual transmission. The Olds W-31 has a TH350 3-speed automatic. The Oldsmobile has a set of 3.91 rear gears. The Chevy Corvair has 3.70 rear gears. The Corvair Monza is light, only 2662 pounds including driver. The Oldsmobile w31 is somewhat heavy at 3718 pounds with driver. The Corvair was very affordable with base price $2506, and the 140 horsepower flat 6 was only another $79. The base Oldsmobile F85 price was $2787, but the W-31 package was another $368 and the high performance TH350 auto transmission was another $205. Hot Rod tested a 1970 Oldsmobile w31 and it ran the 1/4 mile in 14.62 @ 96.05 MPH. The featured Oldsmobile is the record holder for the quickest W31 in Pure Stock drag racing history. The Corvair Monza ran quick, but blew its transmission after 1 or 2 runs. The builder states the Monza actually made just over 200 horsepower to the rear wheels! There were only 2717 total Chevrolet Corvair Monzas produced in 1969, and only 116 W-31 sport coupes in 1970.
The bonus race shows a 1969 Mercury Cougar Eliminator with a 351 V8 making 290 horsepower. It has a 3-speed automatic transmission and highway friendly 3.25 rear gears. Weight with driver is 3776 pounds. There were only 1145 total Eliminator 351 auto cars produced that year.

Pure Stock Muscle Car Drag Race (PSMCDR). FAST Factory Appearing Stock Tire factory stock. Super Car Drag Race. Remember, both cars participate in the Pure Stock Muscle Car Drag Race series, so please check out their website: https://www.psmcdr.com
Also make sure you find them out on Facebook.

The rules for PSMCDR are listed below:

For 1955 to 1979 musclecars built in United States and Canadian assembly plants with a minimum warranty of 12 months and 12,000 miles.
Any car running faster than 11.50 will be disqualified and will not have a qualifying time recorded.
Any convertible running faster than 13.50 will be disqualified and will not have a qualifying time recorded.
Casting numbers must be correct for the year and horsepower claimed including intake manifold, heads, and exhaust manifolds. Blocks do not have to be "numbers matching," but they must be the correct displacement. Overbores up to .070" are allowed. Stock cranks only.
All Engines – 1.5 extra points allowed over advertised.
The camshaft must be correct for the year, model, and horsepower claimed for the type of lifter (hydraulic or solid). Roller cams NOT allowed.
The valve train must be factory stock for the year, make, and horsepower claimed.
The ignition system must be stock, including the distributor, cap, coil, and wires. Points may be replaced with any electronic conversion that fits under the stock distributor cap.
The carburetor must be correct for the year, make, and horsepower claimed. Jetting and metering changes are permitted. THE CHOKE ASSEMBLY MUST BE IN PLACE AND FUNCTIONAL!
Cast-iron exhaust manifolds are mandatory and must be correct for the year, model, and horsepower claimed. Internal modifications to the exhaust manifolds are NOT allowed. Under no circumstances will headers be allowed, including those cars that came with headers delivered in the trunk. Pipes must be routed as they were originally for the year, make, model, and engine combination. Mufflers must be stock looking in design, that is, oval in shape. No glasspacks or straight pipes allowed unless installed as original equipment. Maximum muffler inlet and outlet size is 2.5 inches. X & H pipes allowed.
The radiator must be correct for the year, make, model, and horsepower claimed. No lightweight, aluminum radiators allowed.
The camshaft must be correct for the year, model, and horsepower claimed for the type of lifter (hydraulic or solid). Roller cams NOT allowed. Duration at .050" lobe lift must be within 1% of factory specs. Lift at the valve must be within 2% of factory specs. Maximum stall limited to 2200 rpm.
The transmission must be correct for year, make, model and engine of the car. 3-speed manuals may be upgraded to the correct 4-speed if originally available.
The rear axle must be of the same manufacturer as the car. Any gear ratio is allowed.
Reproduction tires or radial tires only.You are allowed to run tires one size over stock.
Factory wheels only.


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